Mark 4 bed levelling not working, scratched on self test before print  

RE: Mark 4 bed levelling not working, scratched on self test before print

Hello. I have exact same problem in left-back area of the bed. How did you fix that? Or what Prusa support said you on this? Thanks for answer

RE: Mark 4 bed levelling not working, scratched on self test before print

Also first layer is not "perfect" like advertising spot for MK4 saying.

I checked my build and i cant find nothing wrong. I also recalibrated loadcell many times. Many times i reseted printer to factory setings (reset with reflash firmware). Nothing helped

Today i will write on support chat because i dont know what i have to do.

RE: Mark 4 bed levelling not working, scratched on self test before print

Problem solved. I didnt noticed that extruder hit black screw on my angle cable cover mod during bed mesh leveling. Screw lifted up extruder and Z - motors force down to bend build plate and nozzle scratched bed. My fault